What powers stem.cz?
Last seen Sep 2026 · 30 technologies across 15 categories
Analytics
CMS
Databases
Font scripts
JavaScript frameworks
JavaScript graphics
JavaScript libraries
Miscellaneous
PaaS
Performance
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Video players
Web servers
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WordPress plugins
AI Crawlers
robots.txt could not be read at the last check (Oct 2026), so its policy is unknown.
- robots.txt not checked
- llms.txt not checked
- ai.txt not checked
Top search keywords
| Keyword | Position | Est. monthly visits |
|---|---|---|
| czech republic president | #16 | 12 |
| czech president | #16 | 12 |
| czech republic leader | #41 | 6 |
| president of czech republic | #15 | 5 |
| is the czech republic part of nato | #11 | 2 |
| is czech republic in the eu | #51 | 2 |
| is czech republic in nato | #11 | 2 |
| czech republic and nato | #10 | 2 |
| czech eu | #26 | 2 |
| public czech | #94 | 1 |
| is czechoslovakia part of nato | #10 | 1 |
| is czechia in nato | #11 | 1 |
| is czech republic part of nato | #9 | 1 |
| czechia eu | #11 | 1 |
| czech republic ukraine | #11 | 1 |
| who is the president of czech republic | #47 | 0 |
| who is the leader of czech republic | #42 | 0 |
| who is czech president | #39 | 0 |
| dlo | #16 | 0 |
| ukraine to czech republic | #20 | 0 |
| volebn przkum | #20 | 0 |
| volebn przkum | #10 | 0 |
| retirement czech republic | #77 | 0 |
| anti ukrainian sentiment | #26 | 0 |
| petr pavel approval rating | #59 | 0 |
The site's top keywords in Google (US), with the visits each one is estimated to bring per month.
Top backlinks
Top links pointing at the site, one per source domain, strongest first. The anchor text opens the page carrying the link.
AI Crawlers
Policy unknown
Audience
- 61% phone
- 39% desktop
Czechia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
5.71 / 10 · ranked #136,322 of all domains
240 referring domains · OpenPageRank
Search traffic
51 est. monthly organic visits (US)
38 keywords in Google's top 30
Core Web Vitals
| LCP | 1.6 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 700 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Czech (Czechia)
- CDN: Google
- Weight: 1.2 MB · 86 requests
- WordPress theme: hello-elementor (child: hello-elementor-child) · all themes
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- STEM Ústav empirických výzkumů, z.ú. (STEM on Wikidata)
- Founded: 2015
- Country: Czech Republic
- Profiles: X, Facebook, Instagram, LinkedIn
From the homepage's own structured data (Sep 2026) and Wikidata (CC0).
Infrastructure
- Registered May 1998 (28 years), renews Oct 2027
- Hosted on Google (35.214.168.224)
- DNS: SiteGround Email
- Email: Microsoft 365
- Email security: no SPF record, no DMARC record
- SSL: Let's Encrypt, RSA 2048, wildcard, expires Dec 2026
- Common Crawl link graph: rank 1,096,879, 4 hosts
DNS records as swept Oct 2026, certificate as seen Oct 2026, registration from the registry's RDAP service. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.stem.cz | 28 |
| vyzkum.stem.cz | 9 |
Full technology history →
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Recent changes
- dropped Google Font API May 2026
- detected anime.js Apr 2026
- detected GSAP Apr 2026
- detected Highlight.js Apr 2026
- detected Plyr Apr 2026
- detected Popper Apr 2026
- detected Reveal.js Apr 2026
- detected Tippy.js Apr 2026
- detected Twitter Emoji (Twemoji) Dec 2025